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Energies and Yields of Prompt Gamma Rays from Fragments in Slow-Neutron Induced Fission of 235U

Abstract

Measurements were made on the gamma radiation emitted from fission fragments in slow-neutron induced fission of 235U. The fragments were detected with solid state detectors of the surface barrier type and the gamma radiation with a Nal(Tl) scintillator. Mass selection was used so that the gamma radiation could be measured as a function of fragment mass. Time discrimination between the fission gammas and the prompt neutrons released in the fission process was employed to reduce the background. The gamma radiation emitted during different time intervals after the fission event was studied with the help of a collimator, the position of which was changed along the path of the fission fragments. In this way it was possible to select various collimator settings and let gamma radiation of different half-lives be enhanced. Gamma-ray energy spectra from these time components were then recorded as function of mass. The spectrum shape differed greatly depending on the half-life of the radiation and the fragment from which it was emitted. The results of the present measurements were discussed in the light of existing fission models, and comparisons were made with prompt gamma-ray and neutron data from other fission experiments
Authors:
Albinsson, H [1] 
  1. Chalmers Univ. of Technology, Goeteborg (SE)
Publication Date:
Apr 15, 1971
Product Type:
Technical Report
Report Number:
AE-420
Resource Relation:
Other Information: 27 refs., 39 figs.
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; URANIUM 235; FISSION; SLOW NEUTRONS; PROMPT GAMMA RADIATION; FISSION FRAGMENTS; ENERGY YIELD; GAMMA SPECTRA
OSTI ID:
922475
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0808020
Availability:
Commercial reproduction prohibited; OSTI as DE00922475
Submitting Site:
SWDN
Size:
60 pages
Announcement Date:
Jan 25, 2008

Citation Formats

Albinsson, H. Energies and Yields of Prompt Gamma Rays from Fragments in Slow-Neutron Induced Fission of 235U. Sweden: N. p., 1971. Web.
Albinsson, H. Energies and Yields of Prompt Gamma Rays from Fragments in Slow-Neutron Induced Fission of 235U. Sweden.
Albinsson, H. 1971. "Energies and Yields of Prompt Gamma Rays from Fragments in Slow-Neutron Induced Fission of 235U." Sweden.
@misc{etde_922475,
title = {Energies and Yields of Prompt Gamma Rays from Fragments in Slow-Neutron Induced Fission of 235U}
author = {Albinsson, H}
abstractNote = {Measurements were made on the gamma radiation emitted from fission fragments in slow-neutron induced fission of 235U. The fragments were detected with solid state detectors of the surface barrier type and the gamma radiation with a Nal(Tl) scintillator. Mass selection was used so that the gamma radiation could be measured as a function of fragment mass. Time discrimination between the fission gammas and the prompt neutrons released in the fission process was employed to reduce the background. The gamma radiation emitted during different time intervals after the fission event was studied with the help of a collimator, the position of which was changed along the path of the fission fragments. In this way it was possible to select various collimator settings and let gamma radiation of different half-lives be enhanced. Gamma-ray energy spectra from these time components were then recorded as function of mass. The spectrum shape differed greatly depending on the half-life of the radiation and the fragment from which it was emitted. The results of the present measurements were discussed in the light of existing fission models, and comparisons were made with prompt gamma-ray and neutron data from other fission experiments}
place = {Sweden}
year = {1971}
month = {Apr}
}